What’s Vulnerable › Vulnerabilities

CVE-2019-14463

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-07-31 · updated 2026-06-17
• Weakness: CWE-125

Description

An issue was discovered in libmodbus before 3.0.7 and 3.1.x before 3.1.5. There is an out-of-bounds read for the MODBUS_FC_WRITE_MULTIPLE_REGISTERS case, aka VD-1301.

Affected products

• Debian Linux: 9.0
• Fedoraproject Fedora: 29, 30
• libmodbus: before 3.0.7; from 3.1.0 before 3.1.5 — fixed in 3.0.7, 3.1.5

How to fix

Upgrade to a fixed version: libmodbus 3.0.7, 3.1.5. Check the vendor advisory for mitigations.

References

• https://github.com/stephane/libmodbus/commit/5ccdf5ef79d742640355d1132fa9e2abc7fbaefc
• https://libmodbus.org/2019/stable-and-development-releases/
• https://lists.debian.org/debian-lts-announce/2021/11/msg00020.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HAGHQFJTJCMYHW553OUWJ3YIJR6PJHB7/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PRAQZXGAZY6UGWZ6CD33QEFLL7AWW233/
• https://github.com/stephane/libmodbus/commit/5ccdf5ef79d742640355d1132fa9e2abc7fbaefc
• https://libmodbus.org/2019/stable-and-development-releases/
• https://lists.debian.org/debian-lts-announce/2021/11/msg00020.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HAGHQFJTJCMYHW553OUWJ3YIJR6PJHB7/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PRAQZXGAZY6UGWZ6CD33QEFLL7AWW233/

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